Help Needed !! What Kind Of Angles Does This Triangle Have? Acute, Obtuse, Right, Equiangular Explain Your Answer

Having a hard time understanding this question (see attachment).

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates